@ricardofarris 100%
Compare my 89yo grandmother to my SO's 80yo grandmother.
Mine has always been active, albeit knows her limits these days. REFUSES to use her stair lift; would rather crawl up the stairs on her hands and knees, walks to the shops, walks to see her friend, gardens (within the allowances of her knees!), and does most things for herself. She had a nasty accident to her leg a few years ago and rehabilitated herself and got back up on her feet. My Gramps (her husband) was active til the day he died at 93 of old age. They are both my inspiration to keep active.
My SO's has lived a life of luxury and money, and as a result has been lazy. She has a walker, relies on other people, refuses to even try and do a bit of walking around her complex. She sits day in day out in her flat. Honestly, it sounds like no life to live.
Obviously, circumstances are different for people, I get that, and some things are unavoidable for some people and in some cases at that age when you're down, you genuinely can't get back up again. But I find the stark contrast between the two people interesting; there is no excuse but laziness in my SO's grandmothers case.